Jaw crusher, compound movement



Original Filed J une 16, 1942,

Oct. 25, 1949. A. R. EBERSOL 2,485,717

JAW GRUSHER; COMPOUND MOVEMENT 2 Sheets-Sheet 1 Fig.1.

Get. 25, 1949. A R. EBERSOL 2,485,717

JAW CRUSHER, COMPOUND MOVEMENT Original Filed June 16, 1942 2 Sheets-Sheet 2 FiQ'. 2.

7 INVENTOR.

Ca/mflwm Gli'l'ormeqs Patented Oct. 25, 1949 UNITED STATES PATENT OFFICE i-JAWfCRUSHER, COMPOUND MOVEMENT Amos It. "Ebersol, Lancaster, Pa.

original application June 16, 1942, Serial No. 447,258. Divided. and this application April 12, 7-1945, Serial No. 587,848

10--Claims. 1

This invention .relates "to apparatus for crushing relatively hard material such as rock, ore, and the like, and more particularlyto what are known as jaw crushers.

In my application Serial No. 447,258, filed June 16, 1942, of which this application is a division, and which became'Ratent'No.'2,380;419 on July 31, 1945,'I have disclosed and claimeda novel jaw crusher wherein both jaws receive-their movement from a single eccentric, one ,jaw being ,moved thereby through a closed curved path while the opp sing jaw, moved indirectly by the s me e c ntric, is reciprocated "in substantially 'a straight line path. ,Among the many advantagespossessed by a crusher embodying said invention are: "one, the magnitude of the relative movement between the crushing'facesof the opposingjawsis substantially uniform throughout and as the relative movement between the 'jaw'facesis substantially equal at the'top of the jaws and-atithe bottomof the jawsthere is substantially the same "amount of crushing workthroughouttheir crushingfa'ces; two, the opposing jawsmovethe'material-downwardly during the crushing act-andthen rapidly releaseit to the action-of gravity at the precise moment when the greatest possible impetus is imparted to-it by the downwardmovement of both jaws; three, the movement of'the jaws-in thedirection-of material iiow'is substantially equal to the total relative approach of *the crushing faces throughout. In thepreferred embodiments disclosed in said application these advantages are obtained-by keeping thecrushing faces of both jaws at a substantially constant angle to-the horizontal throughout-the crushingcycle,'usin;g'a control means for the-eccentrically-driven jaw which is remote fromthe'crushing face of saidjaw.

It has been proposed in the patent to Cookfield,'No. 1,133,101, and also -in=the'German Patent No. 306,017, to provide a crusher-in which each of the two opposing jaws is ---provided with an eccentric individualthereto at the same end,'while the opposite endsof'the two jaws-are-eachunder the control of links or the -like,-commonlyknown as toggles, individual thereto. This arrangement results-in a crushing stroke'of great magnitude at the end where the eccentrics oppose each other whilethe'oppos'ite endsunderthecontrol of the toggles have a relatively small crushing :stroke.

Anotherdisadvantage of this construction'is that the releasing movement is notof'the same characterat the top and bottomof the jawsgit being obvious that at the end under the control of 'the eccentric the recession of thejaw faces after ,each crushing stroke is m'uchmore rapidthan at the end-under the control of the toggles. Moreover, in this arrangement the downward movement of the jaws can onlybe approximately one half 'of the maximum total relative approach of 'the crushing faces.

It is an object .of this invention to provide a novel crusher wherein the opposing jaws are each moved 'bypan eccentric means individual thereto and controlled "by afloating mountingindividual thereto but arrangedin such way that the above referred to disadvantages are eliminated.

Another'object of this'inventionis to'provi'de a novel *crusher wherein-each jaw-is moved by a single eccentric means individual thereto cooperating with acontrol means individual *thereto but arranged in such way thatthe total relative approach and recession of the crushing faces are substantially uniform and equal throughout.

Anotherobjectlofthis invention isto provide'a novel crusher wherein the movements of relative approach and recessionof theljaw faces. ;are maintained {substantially uniform throughout without use of-the relatively long arm-0r paircof arms extending to relatively remote control means employedlin my:aforesaid parentaapplication.

Another object of this invention is to providea novel crusher wherein the rocking movement in the-crushing faceof-one jaw-is offset ,by the opposite rocking movement in'the-crushingface of the other jaw to-maintain substantially uniform movements ofz approach and recession throughout their crushing faces at all times similar to that obtained byvembodiments .in my (parent application throughuseof other means.

Another obj ect of .thisinventionis-to provide a novel crusher ofthe character referred .to which is actuated by two opposedeccentrics but wherein the movement of the jaws in Lthedirection of the material flow is substantially equal to themaximum total relative approach ,or recession of said Jaws.

Another object of this invention is to provide a novel crusher wherein the relative recession of the jaw faces throughout is initiated at the .moment the greatest downward impetusis imparted tolthe 3 material being crushed by the downward movement of both jaws.

Another object of this invention is to provide a novel crusher of the character referred to whereby some of the advantages pointed out in my aforesaid parent application can be obtained by using onl two eccentrics.

Another object of this invention is to provide a novel crusher which will obtain the desired character of jaw movement without using more than one eccentric with each jaw.

Another object of this invention is to provide a crusher of the character referred to wherein the control means and moving means for each jaw are so arranged as to produce a substantial mechanical advantage.

Another object of this invention is to provide a crusher as above characterized which is simple in construction, compact particularly in length, strong and rugged, and highly efilcient in operation.

Other objects will appear from the following description.

The invention is capable of receiving a variety of mechanical expressions only one of which is shown diagrammatically on the accompanying drawing, but it is to be expressly understood that the drawing is for purposes of illustration only and is not to be construed as a definition of the limits of the invention, reference being had to the appended claims for that purpose.

The drawing shows schematically one embodiment of the present invention, reference being had to my aforesaid parent case for details of construction that may be used in embodying principles which here can best be explained by diagrammatic showing. In said drawing Fig. 1 is a schematic elevation and Fig. 2 is a diagram to illustrate the relative movements of the crushing faces.

As illustrated, the crusher has two jaws I and H of any suitable size and construction provided with crushing faces l2 and I3 of any suitable character and so arranged as to provide a space therebetween which decreases in width towards the lower end thereof for receiving and acting on the material to be crushed in conformity with principles well understood in the art. The crushing face of each jaw is driven through a closed curved path by an eccentric, M and I 5 respectively, or other suitable means, associated with the relatively opposite ends of said jaws, said eccentrics being mounted on and driven by shafts 3H and 3| mounted in bearings on any suitable frame (not shown).

To support each jaw at the opposite end i 6 or I1 from its respective eccentric there is provided a floating or yieldable connection, l8 and 19 respectively, which may be of any suitable construction and material. In the drawing these yieldable connections extend from the jaws in planes which are substantially at right angles to the crushing faces. Even with both connections in this position an ample crushing stroke is provided at the top and bottom of the crushing path because the opposed jaw in each case has its eccentric in approximately horizontal alignment therewith.

As shown the floating mountings are in the form of links pivoted to the members 50 and H at 20 and 2| respectively, and to the frame of the machine, or other solid support, at 22 and 23 respectively, and extending at substantially right angles to the lengths of the jaws. But any other suitable form of support yieldable in the direction of the length of each jaw may be employed.

While the crushing faces I 2 and 53 may be uninterrupted so as to extend the full length of the jaws proper, I prefer for some purposes to subdivide the crushing faces into two or more pairs of crushing faces as shown in the drawing, wherein a second pair of crushing faces is provided at 24 and 25 with a grading device 26 interposed between the two pairs of crushing faces for separating the fines from the material operated upon by the faces I 2 and it before the coarser material passes to the'faces 24 and 25. The fines separated by the grading device 26 may be led away through any suitable passage 21. As the grading device 26 is mounted directly on the jaw l I not far from its eccentric 15 it will be observed that it moves through a closed curved path with the crushing face of this jaw whereby the crushed material leaving the throat between the faces i2 and i3 is thoroughly agitated for separation of the fines before the coarser material is delivered to the action of the faces 24 and 25.

The two eccentrics are driven in synchronism by any suitable intermeshing gearing as diagrammatically indicated at 28 and 29, which gearing may be driven in any suitable way as by motor, belt pulley, chain drive, etc., on either shaft 30 or 3|.

In operation the two jaws i0 and H are driven in synchronism by the eccentrics i 4 and E5, the two eccentrics having their eccentricities displaced substantially degrees with respect to each other as illustrated so that under the action thereof the two jaws simultaneously approach and simultaneously recede from each other in unison. The crushing face of each jaw therefore moves through a closed curved path at the end thereof driven by the eccentric as indicated at t 3 in Fig. 2, but at the ends 16 and I! the movement is constrained to that of a relatively fiat arc by reason of the floating mounting I8 and 19 as indicated at e in Fig. 2. As both upper and lower ends of the two jaw faces are concurrently possessed of cyclic andsubstantially straight line movement the midpoint on each crushing face.

has a cylic movement of t/2 as shown in Fig. 2, while the faces of both jaws are relatively approaching or receding throughout their upward and downward movements. Thereby said jaws have relative movements of approach and recession which are approximaetly equal and substantially uniform throughout their areas. The crushing faces throughout approach relatively during the last half of their upward movement and the first half of their downward movement, after which they recede rapidly to release the material to gravity until it is caught in the next crushing stroke. cession throughout the jaw faces begins at approximately that instant at which the jaw faces have their maximum speed in the downward direction and continues through the last half of their downward movement and the first half of their upward movement. I

Hence a crusher in conformity with the present invention possesses much of the improved operation and advantages explained in detail in my aforesaid application Serial No. 447,258 to which cross reference is made for details as to the construction, support, etc., of floatingly controlled and eccentrically driven jaws which can be used in embodying the present invention. It is to be expressly understood, however, that the present invention is not limited to the use of details there- The movement of relative reinsdisclosedp as any suitableconstruction: of j aw; driving means, floating .control, etc., can be used in. embodying the principl'esof the presentinvention without departing from the spiritthereof as will now be apparent to those skilled in the art. Reference-is therefore to be had to the appended claims for-a definition of the limits of the invention.

What-is claimed is:

1. In a crusher, the combination-of cooperating first and second crusher jaws having opposed crushing faces positioned toprovide-a path for the fiow of material therebetween, means for driving therespectively opposite ends of the jaws to move thecrushing face of each in a closed curvedpath, each of said jaws including control means cooperating. therewith at a location remote from its driving means and coacting with said driving means to main-tairrzthe adjacentiportion of said jaw moving approximately in-a, flat'iarc,

means for driving said driving meanssubstantially in synchronism, and a grading means entirely supported on one of said jaws to partake of the fult movement thereof and positioned in the path of material passing between the faces of said aws.

2;. Ina crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, means for" driving the respectively: opposite ends of the jaws to move the crushing faceof each in a closed curved-path, each of said jaws'including control means cooperating therewith at a location remote from its driving means and coacting with said driving means to maintain the adjacent portion of said jaw moving approximately in a flat arc, means for driving said driving means substantially in synchronism, crushing faces of said jaws being subdivided into at least two pairs of cooperating crushing sections, and grading means entirely supported on one of said jaws and disposed between upper and lower sections of said faces, said grading means delivering the coarse material to the space between a pair of cooperating face sections below said grading means.

3. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, eccentric drivr ing means operatively connected with and cooperating only with the relativelyopposite ends of the respective jaws to move the adjacent portions of the respective jaw faces in closed curved paths, said eccentric means cooperating with said jaws to move the jaw faces thereof in the direction of material flow by an amount which is substantially equal to the amount said faces are moved toward and away from each other by said eccentric means, means cooperating with the respective jaws to effect bodily movement of the portions thereof which are relatively remote from their associated eccentric means in directions lengthwise of their crushing faces along approximately straight lines, and means for driving said eccentric means.

4. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, eccentric driving means operatively connected with and cooperating only with the relatively opposite ends of the respective jaws to move the adjacent portions of the respective jaw faces in closed curved paths, said eccentric means cooperating with said jaws movement-cf the adjacent portions of the jaw faces lengthwise of their crushing faces along approximately straight-lines, and means for driving said eccentric means.

5. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing-faces positioned to'provide a path for 1 the flOW of material therebetween, eccentric driv ing'means cooperating with each jaw only at the relatively opposite ends thereof to move the adjacent portions of" the associated jaw' faces in closed curved paths and to move both jaws bodily lengthwise of their crushing faces'by an amount approximately equalto their relative. approach and recession, control means cooperatingwith each jaw at a portion thereof which is remote from the associated eccentric means to restrain the movement of the associated jaw face adjacent thereto to one along a relatively flat arc, and means for driving said eccentric mean subs stan tially" inisyn'chronism.

6. In a crusher, the combination of cooperating first and second crusher jaws. having opposed crushing faces positioned to provide a path for the fiow of material therebetween, eccentric driving, means associated with the relatively opposite ends of said jaws and control means associated with each jaw adjacent the driving means associated with the other jaw to effect movement of the jaw face associated with and adjacent to each control means to one along a relatively flat arc, said eccentric means cooperating with said jaws to move the jaw faces substantially simultaneously toward and substantially simultaneously away from each other and to move the jaw faces bodily in the direction of their length by an amount approximately equal to their relative approach and recession, and means for driving said eccentric means substantially in synchronism.

'7. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushingfaces positioned to provide a path for the flow of material therebetween, eccentric driving means associated with the relatively opposite ends of said jaws and control means associated with each jaw adjacent the driving means associated with the other jaw to effect movement of the jaw face associated with and adjacent to each control means to one along a relatively flat are, said eccentric means cooperating with said jaws to move the jaw faces substantially simultaneously toward and substantially simultaneously away from each other and to move the jaw faces downwardly in the direction of material flow during the last part of their relative movement toward each other and the first part of their relative movement away from each other, and means for driving said eccentric means substantially in synchronism.

8. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, an eccentric driving means associated with each jaw, said jaws extending in opposite directions from their respective driving means, said eccentric means cooperating with said jaws to move their jaw faces toward and away from each other with substantial simultaneity and to move said jaw faces in the direction of their length by amounts substantially equal to their relative approach and recession, means for impressing an approximately rectilinear movement lengthwise of its jaw face on the portion of each jaw remote from its eccentric driving means, and means for driving said eccentric driving means substantially in synchronism.

9. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, an eccentric driving means associated with each jaw, said jaws extending in opposite directions from their respectivle driving means, said eccentric means cooperating with said jaws to move their jaw faces toward and away from each other with substantial simultaneity and to move said jaw faces in the direction of their length by amounts substantially equal to their relative approach and recession, means for impressing an approximately rectilinear movement lengthwise of its jaw face on the portion of each jaw remote from its eccentric driving means, each of said last named means including a control member disposed approximately in opposition to the eccentric driving means associated with the other jaw, and means for driving said eccentric driving means substantially in synchronism.

10. In a crusher, the combination of cooperating first and second crusher jaws having opposed crushing faces positioned to provide a path for the flow of material therebetween, eccentric driving means associated with each jaw, said jaws extending in opposite directions from their respective driving means, control means associated with a portion of each jaw remote from said driving means and restraining the adjacent portion of said jaw to an approximately rectilinear movement in a direction lengthwise of the jaw face, said eccentric driving means cooperating with said jaws to effect relative movement of approach and recession of the jaw faces which are approximately equal for the opposite ends of said jaw faces and movements of the jaw faces in the direction of material flow which are approximately equal to said movements of ap-, proach and recession, and means for driving said eccentric means substantially in synchronism.

AMOS R. EBERSOL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS I Number Name Date 1,007,953 Fox Nov. 7, 1911 1,133,101 Cockfield Mar, 23, 1915 1,346,871 Andresen July 20, 1920 1,936,742 Youtsey Nov. 28, 1933 FOREIGN PATENTS Number Country Date 306,017 Germany June 11, 1918 418,264 Great Britain Oct. 22, 1934 438,700 Great Britain Nov. 21, 1935 580,475 Germany July 12, 1933 731,182 France May 24, 1932 

